Sergra Darkthorn
Found in The Barrens.
The Barrens
Quest Level Side Plainstrider Menace 12 Both The Zhevra 13 Both Prowlers of the Barrens 15 Both Echeyakee 16 Both The Angry Scytheclaws 17 Both Jorn Skyseer 18 Both Quest Level Side Sergra Darkthorn 10 Both Crossroads Conscription 12 Both Plainstrider Menace 12 Both The Zhevra 13 Both Prowlers of the Barrens 15 Both Echeyakee 16 Both The Angry Scytheclaws 17 Both Ability 
Mortal StrikeZone Spawns Coordinates The Barrens 1 52.2, 31.0